We just pushed an update to our current browser button that’s so big, I’m calling it The Greatly Improved Edition. 1Password 4 for Mac and Windows 4.0 beta testers can check to make sure their auto-update features are locked in their upright positions and take the new button out for a spin now.

You can read the full release notes after the break below, but the gist of this release is that everything about the 1Password button is Improved: filling your username and password where they’re supposed to go, dealing with fancy hidden login forms, filling credit card details, and just a whole bunch of button-fillingy stuff. Oh, and Identities now fill in birthdays.

By the time you finished reading this, Mac v4 users and Windows v4 testers should already have the update, but you can always check your extension settings to make sure. Enjoy the 1Password button Greatly Improved Edition and let us know what you think in our forum!

[IMPROVED] Autosubmit no longer clicks a submit element unless it is 100% certain it will have no side effects. Mac App Store users will need to install this Autosubmit Script: http://i.agilebits.com/jp/Install1PasswordAutosubmit.zip